Red = CP - Cerebral Palsy?
(Source: Toronto Note)

https://pedscases.com/sites/default/files/SNAPSHOTS_Developmental_Milestones_Chart_UPDATED_Aug_2014.pdf
See the Nipissing District Developmental Screen for a checklist of important 18 mo milestones: www.ndds.ca
https://lookseechecklist.com/uploads/content/learn-more/18m-en.pdf